Fig. 1

Flow diagram from measurement with upright computed tomography (CT) to angle calculation. The CT images were acquired from the distal femur to the whole foot using a 320 detector row upright CT scanner (prototype TSX-401R; Canon Medical Systems, Otawara, Japan). The condition of each weightbearing stance was measured using a pressure mat (BIG-MAT; NITTA Corporation, Osaka, Japan) and pressure calculation system (FootMat; Tekscan, South Boston, MA, USA)